X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.document.swt.core%2Fsrc%2Forg%2Fsimantics%2Fdocument%2Fswt%2Fcore%2Fbase%2FWidgetContainer.java;fp=bundles%2Forg.simantics.document.swt.core%2Fsrc%2Forg%2Fsimantics%2Fdocument%2Fswt%2Fcore%2Fbase%2FWidgetContainer.java;h=6053bbab91b8f305c5ab6465fd86754013dfbeab;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.document.swt.core/src/org/simantics/document/swt/core/base/WidgetContainer.java b/bundles/org.simantics.document.swt.core/src/org/simantics/document/swt/core/base/WidgetContainer.java
new file mode 100644
index 000000000..6053bbab9
--- /dev/null
+++ b/bundles/org.simantics.document.swt.core/src/org/simantics/document/swt/core/base/WidgetContainer.java
@@ -0,0 +1,52 @@
+package org.simantics.document.swt.core.base;
+
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+import org.simantics.document.server.JSONObject;
+import org.simantics.document.server.client.WidgetData;
+import org.simantics.document.swt.core.SWTDocument;
+
+public abstract class WidgetContainer<C extends Control> {
+	
+	C control;
+	
+	abstract protected Control doCreateControl(SWTDocument document, Composite parent, JSONObject object);
+	abstract protected void doUpdateProperties(SWTDocument document, Control control, JSONObject object);
+	
+	@SuppressWarnings("unchecked")
+	public void createControl(SWTDocument document, Composite parent, final JSONObject object) {
+		control = (C)doCreateControl(document, parent, object);
+		if(control == null) {
+			new Exception().printStackTrace();
+			return;
+		}
+		doUpdateProperties(document, control, object);
+	}
+	
+	public C getControl() {
+		return (C)control;
+	}
+	
+	@SuppressWarnings("unchecked")
+	public <T> T getOrCreateControl(SWTDocument document, JSONObject object) {
+		if(control == null || control.isDisposed()) {
+			String parentId = object.getJSONField("parent");
+			WidgetData parent = document.getWidget(parentId);
+			if(parent != null) {
+				WidgetContainer<?> parentContainer = (WidgetContainer<?>)parent.widget;
+				Composite pc = (Composite)parentContainer.getOrCreateControl(document, parent.object);
+				// TODO: pc may be disposed, how to handle this and why is it happening?
+				if(pc != null && !pc.isDisposed())
+					createControl(document, pc, object);
+			}
+		}
+		return (T)control;
+	}
+	
+	public void updateProperties(SWTDocument document, JSONObject object) {
+		if(control != null) {
+			doUpdateProperties(document, control, object);
+		}
+	}
+	
+}
\ No newline at end of file